Moon Invoice allows you to set up multiple hourly rates for the same customer. See how it works. 

1. Open the Moon Invoice application on your device, or tap this link.
2. Navigate to Projects and select Add New Project for the same customer.
3. Enter the Project Name, select the Customer, and set the Default Customer Rate.
4. Now, you can manage different hourly rates for the same customer.

                                                                                                                                              - Moon Invoice